HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Billings

$220+ Cheap flights from Ontario to Billings (ONT - BIL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/28. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BIL
Jan 22 — Jan 291
Thu 1/22
Thu 1/29
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Billings with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Ontario to Billings

Cheapest flights from Ontario to Billings
Explore the most affordable flight options available from Ontario to Billings. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 23, 2025.

This Delta deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/235:10 pmONT - BIL
1 stop4h 31mDelta
Fri 1/26:20 pmBIL - ONT
1 stop6h 34mDelta
Deal found 12/22$520
This Kiwi.com deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:07 pmONT - BIL
1 stop14h 17mMultiple Airlines
Sat 1/35:45 pmBIL - ONT
2 stops28h 42mMultiple Airlines
Deal found 12/22$522
This Kiwi.com deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:07 pmONT - BIL
1 stop14h 17mMultiple Airlines
Thu 1/11:18 pmBIL - ONT
2 stops32h 59mMultiple Airlines
Deal found 12/22$529
This Kiwi.com deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:07 pmONT - BIL
1 stop14h 17mMultiple Airlines
Fri 1/28:46 amBIL - ONT
2 stops39h 35mMultiple Airlines
Deal found 12/22$530
This Kiwi.com deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:07 pmONT - BIL
1 stop14h 17mMultiple Airlines
Wed 12/3112:07 pmBIL - ONT
1 stop6h 08mMultiple Airlines
Deal found 12/22$551
This Kiwi.com deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/236:17 pmONT - BIL
1 stop16h 00mMultiple Airlines
Sat 1/35:45 pmBIL - ONT
2 stops28h 42mMultiple Airlines
Deal found 12/22$554
This Kiwi.com deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/236:17 pmONT - BIL
1 stop16h 00mMultiple Airlines
Thu 1/11:18 pmBIL - ONT
2 stops32h 59mMultiple Airlines
Deal found 12/22$561
This Kiwi.com deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/236:17 pmONT - BIL
1 stop16h 00mMultiple Airlines
Fri 1/28:46 amBIL - ONT
2 stops39h 35mMultiple Airlines
Deal found 12/22$562
This Kiwi.com deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/236:17 pmONT - BIL
1 stop16h 00mMultiple Airlines
Wed 12/3112:07 pmBIL - ONT
1 stop10h 10mMultiple Airlines
Deal found 12/22$583
This Delta deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/235:10 pmONT - BIL
1 stop4h 31mDelta
Sat 1/36:20 pmBIL - ONT
1 stop5h 08mDelta
Deal found 12/22$589
This United Airlines deal was found by Cheapflights users on 12/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/241:40 pmONT - BIL
1 stop6h 44mUnited Airlines
Fri 1/22:40 pmBIL - ONT
1 stop7h 27mUnited Airlines
Deal found 12/21$614
This American Airlines deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2412:45 pmONT - BIL
1 stop7h 29mAmerican Airlines
Thu 1/16:50 amBIL - ONT
1 stop6h 03mAmerican Airlines
Deal found 12/22$635

Find flight deals from Ontario to Billings

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Billings (BIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 23, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$245
(Alaska Airlines)

One-way from

$220
(Trip.com)

Popular in

March

Cheapest in

April

Average price

$530
Provider with most accurate pricing for Ontario-Billings Logan Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Billings Logan Intl flights.
Search Deals
From Ontario to Billings Logan Intl
Search Deals
One-way flight from Ontario to Billings Logan Intl
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($34 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Billings that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 23, 2025.
Use the filters below to find and compare flights from Ontario to Billings that are best for you.

Fly from

Ontario

Fly to

Billings

Route

Depart

Return

Price

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Sat 1/31

4:03 pm-11:36 pm

1 stop6h 33m

Billings Logan Intl

Wed 2/4

3:35 pm-3:08 pm

1 stop24h 33m

$245

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Tue 2/3

7:30 am-5:30 pm

2 stops9h 00m

Billings Logan Intl

Mon 2/9

6:15 pm-11:58 pm

1 stop6h 43m

$253

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Sat 1/24

11:53 am-11:36 pm

1 stop10h 43m

Billings Logan Intl

Wed 1/28

7:00 am-3:08 pm

1 stop9h 08m

$254

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Tue 2/3

11:53 am-11:36 pm

1 stop10h 43m

Billings Logan Intl

Mon 2/9

2:02 pm-3:08 pm

1 stop26h 06m

$254

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Sat 1/24

6:00 am-11:06 am

1 stop4h 06m

Billings Logan Intl

Wed 1/28

11:47 am-10:51 pm

2 stops12h 04m

$257

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Fri 6/5

6:00 am-1:16 pm

1 stop6h 16m

Billings Logan Intl

Tue 6/9

7:21 pm-11:58 pm

1 stop5h 37m

$339

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Fri 6/5

6:00 am-1:16 pm

1 stop6h 16m

Billings Logan Intl

Mon 6/8

7:21 pm-11:58 pm

1 stop5h 37m

$339

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Tue 6/9

7:00 am-2:54 pm

1 stop6h 54m

Billings Logan Intl

Sat 6/13

7:11 pm-11:56 pm

1 stop5h 45m

$339

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Sun 12/28

6:00 am-9:15 pm

1 stop14h 15m

$220

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Tue 1/6

4:36 pm-12:32 am

1 stop6h 56m

$269

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/21

Showing 1-10 of 11 results
1
2

Compare providers for flights from Ontario to Billings

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Billings in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Billings flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Billings flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ontario-Billings flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Billings flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Billings flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to Billings

Have a flexible travel schedule? Discover the best time to fly to Billings from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Billings

What is the cheapest month to book a flight from Ontario to Billings?

Currently, August is the cheapest month in which you can book a flight from Ontario to Billings (average of $116). Flying from Ontario to Billings in April is currently the most expensive (average of $256). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to BIL?

Find hourly flight availability from Ontario to Billings. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 23, 2025.

One of the essential ways to save on airfare from Ontario to Billings is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 30% on airfare.

How much does it cost to fly round-trip from Ontario to Billings?

Reviews of airlines servicing Billings

Get insights into the airlines that provide service to Billings. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Billings. Reviews last updated December 23, 2025.
Read through reviews of airlines operating flights from Ontario to Billings, such as Alaska Airlines, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,517 reviews

Overall

8.0

Food

7.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
Alaska Airlines
8.0
Very good
11,517 reviews
Alaska Airlines
8.0
Very good
11,517 reviews

Overall

8.0

Food

7.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
Delta
7.9
Good
8,015 reviews
Alaska Airlines
8.0
Very good
11,517 reviews

Overall

8.0

Food

7.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
United Airlines
7.4
Good
9,106 reviews
Alaska Airlines
8.0
Very good
11,517 reviews

Overall

8.0

Food

7.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Billings. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ontario to Billings?

    Departing from Ontario to Billings will take you 6h 33m. The distance from Ontario to Billings is about 941 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Ontario to Billings round-trip?

    Currently priced at $260, Delta will fly you from Ontario to Billings and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and Alaska Airlines - these airlines can fly you to your destination from $270 and $284, respectively. Delta is currently priced 33% below the average price you’ll pay for this route.

  • Can I find deals for flights from Ontario to Billings that include hotel bookings?

    Yes. In addition to deals on Ontario to Billings flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Billings?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Billings.

  • Can I find deals for business class flights from Ontario to Billings?

    Yes. Cheapflights offers flight deals from Ontario to Billings by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Billings?

    Currently, August is the cheapest month in which you can book a flight from Ontario to Billings (average of $116). Flying from Ontario to Billings in April is currently the most expensive (average of $256). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Billings

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Bozeman flights
San Francisco to Bozeman flights
Ontario to Bozeman flights
San Diego to Bozeman flights
San Francisco to Kalispell flights
Santa Ana to Bozeman flights
Sacramento to Bozeman flights
San Diego to Kalispell flights
San Jose to Bozeman flights
Los Angeles to Missoula flights
Las Vegas to Bozeman flights
Las Vegas to Kalispell flights
Palm Springs to Billings flights
Santa Ana to Kalispell flights
Los Angeles to Kalispell flights
San Diego to Missoula flights
San Luis Obispo to Bozeman flights
Reno to Bozeman flights
Oakland to Bozeman flights
Los Angeles to Billings flights
Ontario to Kalispell flights
Burbank to Bozeman flights
Sacramento to Kalispell flights
San Diego to Great Falls flights
Ontario to Missoula flights
Burbank to Kalispell flights
Fresno to Kalispell flights
San Francisco to Missoula flights
Santa Barbara to Kalispell flights
Burbank to Missoula flights
Long Beach to Bozeman flights
Palm Springs to Bozeman flights
Burbank to Billings flights
Santa Ana to Billings flights
Santa Ana to Missoula flights
San Francisco to Billings flights
San Diego to Billings flights
San Luis Obispo to Billings flights
San Francisco to Helena flights
Los Angeles to Helena flights
Ontario to Helena flights
San Jose to Helena flights
Medford to Bozeman flights
Santa Ana to Great Falls flights
Long Beach to Kalispell flights
Reno to Missoula flights
Fresno to Billings flights
San Jose to Kalispell flights
Burbank to Great Falls flights

Top 3 airlines flying from Ontario to Billings

Discover the top 3 airlines that operate flights from Ontario to Billings. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$260Average$331FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$270Average$501FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$284Average$402FlexibilityNo cancel feeOn-time75%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.